ZIP Code 78374

78374 is one of Texas's ZIP codes, delivering to addresses in Portland, San Patricio County.

City: Portland
County: San Patricio County
State: Texas
Prefix: 783xx

Where this code sits

78374 is part of the 783xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Portland.

Portland Texas ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 78374 delivers to without sharing its boundary.

361 Area code 361

ZIP codes nearest 78374

The ZIP codes whose reference points sit closest to 78374.
ZIP code	Distance	Delivers to
ZIP code 78359	2.6 mi	Gregory, TX
ZIP code 78402	6.3 mi	Corpus Christi, TX
ZIP code 78362	6.9 mi	Ingleside, TX
ZIP code 78390	7.5 mi	Taft, TX
ZIP code 78335	8.0 mi	Aransas Pass, TX
ZIP code 78427	8.0 mi	Corpus Christi, TX
ZIP code 78460	8.0 mi	Corpus Christi, TX
ZIP code 78401	8.7 mi	Corpus Christi, TX

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 78374, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 78374. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.